Browsing by Author "Turakhia, Mukesh Harilal"

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Activity of pseudomonas aeruginosa in biofilms: effect of calcium
(1989-01) Turakhia, Mukesh Harilal; Characklis, William G.
Aerobic glucose metabolism by Pseudomonas aeruginosa biofilms at various calcium loading rates was investigated. The influence of calcium on specific growth rate, extracellular polymeric substance (EPS) formation rate, biofilm detachment rate, and biofilm calcium concentrations was determined. Calcium accumulated in the biofilm in proportion to the liquid phase concentration. Increasing calcium concentration increased the cohesiveness of the biofilm as indicated by a lower relative detachment rate. Specific activity in the biofilm was the same as that measured in a chemostat and was not influenced by changing calcium concentration. EPS formation rate in the biofilm was unaffected by calcium concentration but was higher than that observed in a chemostat.
The effect of velocity variation on cooling tower water heat transfer fouling
(Montana State University - Bozeman, College of Engineering, 1980) Turakhia, Mukesh Harilal
Energy losses in water conduits: monitoring and diagnosis
(1981) Characklis, William G.; Zelver, Nick; Turakhia, Mukesh Harilal
Fouling in heat exchange equipment
(1981) Characklis, William G.; Zelver, Nick; Turakhia, Mukesh Harilal
Fouling of heat exchanger surface: measurement and diagnosis
(1984-01) Turakhia, Mukesh Harilal; Characklis, William G.
Fouling in heat exchange equipment results in a significant energy toss by increasing heat transfer resistance and fluid frictional resistance. This paper deals with an effective way to monitor fouling and describes a potentially useful diagnostic approach for discriminating different types of deposit in situ. Information regarding deposit type would be useful in selecting an appropriate treatment procedure. Some cautions regarding the indiscriminate use of fouling factor or fouling resistance are also discussed.
Influence of a calcium-specific chelant on biofilm removal
(1983-11) Turakhia, Mukesh Harilal; Cooksey, Keith E.; Characklis, William G.
This paper describes the influence of ethylene glycol-bis(Î²-aminoethyl ether)-N,N-tetraacetic acid (EGTA) on biofilm removal. The addition of EGTA resulted in the immediate detachment of biofilm which suggests that the chelant removed essential calcium from the biofilm, causing it to detach.
The influence of calcium on biofilm processes
(Montana State University - Bozeman, College of Engineering, 1986) Turakhia, Mukesh Harilal
Bacteria exhibit a tendency for adsorbing to and colonizing surfaces which are submerged in aquatic environments. Adsorption is mediated by extracellular polymeric material which is formed by the bacteria and extends from the cell to the attachment surface. The attached cells reproduce and form additional extracellular polymer increasing the mass of the deposit. The cellular-extracellular matrix is termed a bipfilm. The purpose of this study was to investigate the effect of calcium on cellular reproduction and extracellular polymer formation by Pseudomonas aeruginosa in a biofilm. Experiments were conducted with a pure culture of Ps. aeruginosa using fixed film bioreactors with glucose serving as the limiting nutrient. Results indicate calcium increases the rate and extent of cellular carbon accumulation at the surface. However, there was no effect of calcium on the amount of polymer carbon accumulated on the surface. Results also suggest that free calcium (or calcium assisted ligands) is essential to the structural integrity of the biofilm. The energy required for biochemical conversion of glucose into biomass by suspended or immobilized culture of Ps. aeruginosa was constant and was independent of time, biomass concentration, specific cellular growth rate, and calcium concentration in the medium.
Microbial Films and Energy Losses
(1984) Characklis, William G.; Zelver, Nick; Turakhia, Mukesh Harilal
Fouling microbial film formation can cause significant energy losses as reflected by increased fluid frictional resistance and heat tranfer resistance. Methods to predict and monitor rate of microbial film formation and its effect on energy losses in different environments is essential for efficient design and operation of engineering systems. This paper will discuss measurement methods and their incorporation in predictive models.
An observation of microbial cell accumulation in a finned tube
(1983-12) Turakhia, Mukesh Harilal; Characklis, William G.
Biofouling in heat exchange equipment results in significant energy loss by increasing heat transfer resistance and fluid frictional resistance. This paper compares the deposition and distribution of attached microbial cells on a smooth tube and a tube with inner fins after 100 hours exposure. Preliminary results suggest a significantly different distribution of attached microbial cells on the finned tube.
Theoretical and Experimental Analysis of a Pseudomonas aeruginosa Biofilm
(1988) Characklis, William G.; Bakke, Rune; Turakhia, Mukesh Harilal
Theoretical and Experimental Analysis of a Pseudomonas aeruginosa Biofilm
(1988) Characklis, William G.; Bakke, Rune; Turakhia, Mukesh Harilal